[HeiseBrige] fix: broken bridge
[HeiseBrige] fix: broken bridge

This is a feed expander and heise sometimes includes
feed items which point to https://www.techstage.de
for which we dont have parsing for.

RSS-Bridge/rss-bridge,Riduidel/rss-bridge,Riduidel/rss-bridge,RSS-Bridge/rss-bridge,kranack/rss-bridge,kranack/rss-bridge,ORelio/rss-bridge,RSS-Bridge/rss-bridge,ORelio/rss-bridge,ORelio/rss-bridge,kranack/rss-bridge,Riduidel/rss-bridge,kranack/rss-bridge